BY W. MACLEAY, F.L.S. 315 



than the posterior; the spine is inserted above the middle of the 

 orbit, and is not more than one-half of the length of the head. 

 Caudal fin rounded ; dorsal and anal fins low. Ventral spine 

 very short, fixed. Brown, with small darker brown spots. 

 Length ten inches. 



Tasmania, Port Phillip, Port Jackson. 



» 



999. Monacanthtts Brownii, Bichards. 



Toy. Erebus and Terror, p. 08.— Gunth. Cat. Fishes, TILL, p. 249. 



D. 32-33. A. 30-31. 



Skin minutely granular. Adult specimens with the sides of 

 the tail covered with short, fine, setiform bristles, and with two 

 pairs of strong straight conical spines. Body oblong, its depth 

 being one-third of the length, exclusive of caudal fin. Snout 

 produced, with the upper profile convex. Dorsal spine of 

 moderate strength, straight, much shorter than the snout ; four- 

 edged, each edge with a series of barbs. Caudal fin rounded ; 

 dorsal and anal fins low. Ventral spine none ; abdominal edge 

 trenchant. Green with blue dots over the whole body ; the spots 

 are replaced by blue oblique and longitudinal lines on the side 

 of the head and anterior part of the trunk. The pai*t of the tail 

 which is armed with bristles and spines is of an orange colour. 

 Fins green. Length twelve inches. 



Coasts of Australia. 



1000. Monacaxthus stilomelanuiiits, Quoy & Gaim. 



Gunth., Cat. Fishes VIII., p. 2,50. 



3f. paragaudatus, Bichards., Voy. Erebus and Terror, p. 60, pi. 



39, figs. 1-4. 



I). 30-32. A. 28-32. 



Skin minutely granular. Adult males with a tooth-brush-lik 

 cluster of setiform spines on the side of the tail between the 



